Alcohol burner



Sept. 20, 1938.

M. B. SOLOMON 2,130,434

ALCOHOL BURNER Filed April 18, 1936 2 Sheets-Sheet l "maxi (O LL15 gwuzntoa momma a. soLoMoN v anon Ito's 29 3 \flqlmfiBoLoNON H Q). v.

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p 2%, 1938- M. B. SOLOMON 2,130,434

ALCOHOL BURNER Filed April 18, 1936 2 Sheets-Sheet 2 .6 Fl q 32 Patented Sept. 20, 1938 2 13 434 FFME TE STATES PT? The present invention relates to improvements the burner tip, as illustrated in Fig. 2. Band in an alcohol burner and has for an object to E3 is pivoted some distance from its ends at E9 provide an alcohol burner adjustable to provide and 25 to provide swinging valves 25 for controldifferent flame intensities. ling the air supply ports 22 in the casing. The

A further object is to provide a control means band l8 so pivoted may be used to cut ofi the air for the burner which regulates the flame intensupply to the burner by covering the air ports 22 sity and also acts to extinguish the flame when and the movement of the band serves to cover it is no longer desired. the burner tip H and extinguish the flame. For

A further object is to form the burner with the purpose of moving the band a stem 23 and 10 a shield or casing which serves to retain heat Operating knob 26 are attached to the band at 10 and vaporize the fuel and which also serves to the pivot 26. create a forced draft, It will be noted that due to the spherical shape With the foregoing and other objects in view, of the casing a free air circulation from the the invention will be more fully described hereair ports 22 up throug the burner p H is p 5 inafter, and will be more particularly pointed mitted even when the fuel holder ill is in place 5 out in the claims appended hereto. as will be seen in Figure 1. When the fuel in the In the drawings, wherein like symbols refer to holder H3 is ignited primary combustion takes like or corresponding parts throughout the sevplace just above the mes Cover 52. The flames eral views, thus produced travel along the spherical walls Figure 1 is a central vertical section of a burner of the casing 55 to the burner tip where, due to 20 embodying the features of the present invention. the great excess of oxygen, a secondary combus- Figure 2 is a top plan View of the same. tion takes place and the fuel is completely con- Figure 3 is a side elevation of the left side of sumed in a blue or colorless flame. The flames the burner shown in Figures 1 and 2. which travel along the inner wall of the casing 25 Figure 4 is a side elevation of a modified form 55 rapidly heat the same and with the air ports 25 of burner in which the relation of the flame con- 22 open a fairly rapid convection current of air trol and the flame extinguisher is modified. i s l h d whi h i h p m y s- Figure 5 is a side elevation of a further modiion and pro u a n r flame- H i e t fication of burner in which the shape of the cascasing 15 also assists in vaporizing the fuel so ing has been changed, that it is possible to produce very rapid burning 30 Figure 6 is a side elevation of burner shown in when such is desired. After the casing has been Figure 5 looking at the left side thereof, and hea ed with the ir po s 22 p n h flame will Figure 7 is a side elevation of still another grow wi h h inc e of h until i m y modification having a further modified flame excome desirable to check the burning. This may 5 tinguisher and flame control. be done by rotating the band Iii by means of the Referring now to the drawings and particuknob 2 which is preferably made of wood or larly to Figure 1 the burner comprises a fuel some other non-conducting material. The band holder til filled with a suitable wick material ii i8 is rotated until the valves 2! begin to cover which is saturated with the alcohol or the parthe air ports 22 with consequent checking of the 4 ticular fuel to be used. The wick is held in place flame. Further closing of the air ports 22 will by a cover 52 of a coarse mesh which is kept result in greater modulation of the flame until within the holder it by a ring l3 placed around the desired adjustment is produced. It is also the inside of the top of the holder ill. The holder possible by continuing the rotation of the band ill is set upon a tray l4 and the spherical shaped to partially cover the burner tip so that further shield or casing i5 placed over the container and adjustment is possible. It will be observed from 45 onto the tray i l. The spherical casing is open igure 3 that the valves 2i completely cover the at the bottom to fit snugly about the container air supply ports 22 before the upper part of the i0 and is adapted to fit on the tray 84 to form band It cuts down the burner tip ll. As a result a seal with the upstanding flange it of the tray. of this the air supply may be completely shut off The dome of the casing l5 has a section cut out first and then if necessary the tip opening may 50 to provide a burner tip H. A circular band l8 be decreased. Rotation of the band i8 to the is placed over the casing i5 and is pivoted at vertical position results in completely covering diametrically opposite points !9 and 29. Band the tip H and extinguishing the flame. The 58 is slightly wider than the width of the burner outer ends of the valves 2| are shaped to proopening ll which permits a complete closing of vide for complete coverage of the air supply ports 55 and yet leave clearancebetween the valve and the flange l6 of the tray I4 as the band is rotated. It will also be noted that when it is desired to extinguish the burner quickly when it is completely open the extinguishing band I8 first covers the air supply ports 22 then the burner tip carries the air supply ports 28 at opposite points.

of its circumference. In this form the valves 2| and the band l8 operate about the same time so that air ports 28 are closed at the same time as the burner tip I! is closed. The dome in this burner is a great deal higher than the top of the burner above described with the result that there is a greater air space between the top of the fuel holder 10 where initial combustion takes place and the burner tip I! where the secondary or complete combustion takes place. One result of this is that there is a relatively large volume of heated air in this space which serves to increase the draft through the burner when the ports28 are open. This form is not susceptible of such fine adjustments as the first form of burner due to the change in proportion of the extinguishing portion and the air supply valve portions of the band.'

Referring now to the form shown in Figure 5, the casing 29 is mainly cylindrical and provided with the dome 30 which is flattened at its extreme upper portion as at 3i. Referring to Fig. 6, the burner tip I1 is cut through thisflat portion. In this burner the band 32 consists only of an extinguishing loop and the air ports 22 in opposite sides of the casing are always open. The dome shaped upper portion 30 (seen in Fig. 5) serves to increase the amount of air flowing through the burner and to increase thereby the amount of combustion taking place. Variation of the size of the flame is accomplished by cutting down the size of the opening of the burner tip. This form of the device is particularly useful where a narrow burner is needed as this does not take up the amount of space required by the spherical type and it is not as tall as the type shown in Figure 4. In many applications the amount of adjustment obtainable with this burner is satisfactory.

With reference to the form of burner shown ,in Figure 7, the casing 34 is cylindrical and is crowned by the dome shaped top 35 in which is cut the wide burner tip opening 36. The fuel container and the casing rest on the tray 33 and the air ports 22 are'placed in opposite sidesof the casing 34. The band i8 is pivoted to swing across the burner tip opening 38 and to carry the valves 31 for the ports 22. The loop of the band which travels across the burner tip opening is narrower than the greatest opening of the burner tip opening so that complete extinction of the flame is not possible but only reduction in the effective size of the burner tip opening. The valve portion 3? of the band flares outwardly toward the end so that ports 22 are closed about the same time as the loop of the band it passes across the burner tip opening.

dome shaped top. It has been found that the flames at the. top of the fuel container travel up along the inside of this top and this has a very pronounced effect in increasing the quantity of air drawn through the burner as well as heating up the burner and assisting in volatilizing the fuel.-

It is obvious that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

What is claimed is:

1. An alcohol burner comprising a fuel holder, a casingenclosing said fuel holder the upper portion of which is spherical, a tray for receiving both holder and casing and having an upstanding flange to seal the bottom of the casing, said casing being spaced from said holder and provided with an air port in its lower section, the upper portion of said casing having a centrally located opening to act as a burner tip, a band pivoted on opposite sides of said casing to travel across said opening when rotated about its pivots, and a valve for said air port moving with said band across said air port, the length of said burner tip opening being less than the diameter of the fuel holder.

- 2. An alcohol burner comprising a fuel container, a casing about said container apertured at its bottom to fit over the container the top portion of which is dome-shaped, said top portion being provided with an opening to act as a burner tip, and said casing being provided with air ports at opposite sides thereof, a band fitting partly around said casing to cover said burner tip opening and said air ports, and said band being pivoted inwardly of its ends at opposite sides of said casing to provide a loop movable over the top of the casing to cover the burner tip opening and below the pivots a pair of valves for said air ports movable to close said ports, said loop and said valves moving simultaneously, said valves closing said ports before the loop covers the burner tip opening.

3. In an alcohol burner having a fuel container, a casing about said container comprising a body portion spaced away from said container and a dome shaped upper portion having a burner tip opening therein, said body portion having air ports at opposite sides thereof, a control band pivoted on' said body portion providing a loop for restricting said burner tip opening, and valves for closing said air ports simultaneously when the band is rotated.

4. A burner for volatile fuel comprising, a fuel holder, a' casing enclosing said fuel holder, said casing being spaced from the upper part of the fuel holder, and having a dome-shaped top, said top portion being provided with an opening therein to act as a burner tip, the area of said opening being considerably less than that of the upper portion of the fuel holder, said casing also being provided with an air port in its lower part, and a band having a width substantially equal to the width of the burner tip opening in the dome-shaped top, said band being pivoted to said casing to travel to a position over said burner tip opening, when rotated about its pivots, and a valve for said'air port moving with said band across said air port for closing the same substantiallysimultaneously with the closing by the band of the burner tip opening.

5. An alcohol burner comprising a cylindrically-shaped fuel holder, a dome-shaped casing about said holder having an elongated burner tip opening in the top thereof, said casing being spaced away from said holder to provide an air space therebetween by which the flame from. the fuel is passed out of the burner tip opening, said casing being provided with air port openings in its lower part, and means on said casing for simultaneous control of the burner tip and the air port openings.

6. An alcohol burner comprising a cylindrical fuel holder, a casing enclosing said holder and having a dome-shaped top in which is provided centrally thereof, an elongated burner tip opening, said casing being provided with air ports in its lower portion, said casing being spaced away from said holder to provide an air space therebetween by which the flame from the fuel is passed out of the burner tip opening, a band pivoted on said casing and adapted to gradually close, first the air ports and then the burner tip opening, said air ports being completely closed before the burner opening is closed and remaining closed while the burner opening is being closed.

7. A burner for volatile fuel comprising a fuel holder, a casing enclosing said fuel holder, said casing being spaced from the upper part of the fuel holder and having a dome-shaped top, said top being provided with an opening centrally thereof to act as a burner tip, said opening being considerably smaller than the top of the fuel holder, said casing also having air ports in its lower part, and a band the Width of which is substantially equal to the width of the opening in the dome-shaped top, said band being pivoted to said casing at opposite points and fully covering said opening when rotated about its pivots.

8. An alcohol burner comprising a cylindrically shaped fuel container for solid alcohol, an enclosing casing having a spherically shaped top, the spherically shaped top of said casing being spaced from the top of the container to provide a dome-shaped space therebetween, said top of the casing having an elongated opening cut centrally thereacross, said opening being widest above the central part of the container and tapering towards its ends, said opening in the casing acting as a burner tip, and a control band curved to conform closely to the shape of said top and pivoted to the casing so as to be movable to cover said burner tip and extinguish the flame, said band covering the entire burner tip opening when placed over the same.

MORRIS B. SOLOMON. 

